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75480881 = 729715237
BaseRepresentation
bin1000111111110…
…11111100110001
312021000211022012
410133323330301
5123310342011
611253452305
71604401610
oct437737461
9167024265
1075480881
11396749a3
1221341095
131283a458
14a04b877
15695ea8b
hex47fbf31

75480881 has 16 divisors (see below), whose sum is σ = 90512640. Its totient is φ = 61575360.

The previous prime is 75480869. The next prime is 75480893. The reversal of 75480881 is 18808457.

It is an interprime number because it is at equal distance from previous prime (75480869) and next prime (75480893).

It is not a de Polignac number, because 75480881 - 210 = 75479857 is a prime.

It is a super-2 number, since 2×754808812 = 11394726793072322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75480281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11795 + ... + 17031.

It is an arithmetic number, because the mean of its divisors is an integer number (5657040).

Almost surely, 275480881 is an apocalyptic number.

75480881 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

75480881 is a deficient number, since it is larger than the sum of its proper divisors (15031759).

75480881 is a wasteful number, since it uses less digits than its factorization.

75480881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5344.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 75480881 is about 8687.9733540107. The cubic root of 75480881 is about 422.6157259171.

The spelling of 75480881 in words is "seventy-five million, four hundred eighty thousand, eight hundred eighty-one".

Divisors: 1 7 29 71 203 497 2059 5237 14413 36659 151873 371827 1063111 2602789 10782983 75480881