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71489994 = 2337437489
BaseRepresentation
bin1000100001011…
…01100111001010
311222112001211120
410100231213022
5121300134434
611032140110
71525440432
oct420554712
9158461746
1071489994
1137399544
121bb37636
1311a70a94
1496cd2c2
156422349
hex442d9ca

71489994 has 32 divisors (see below), whose sum is σ = 150279360. Its totient is φ = 22643712.

The previous prime is 71489993. The next prime is 71490047. The reversal of 71489994 is 49998417.

It is a super-2 number, since 2×714899942 = 10221638484240072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71489993) 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, 5802 + ... + 13290.

It is an arithmetic number, because the mean of its divisors is an integer number (4696230).

Almost surely, 271489994 is an apocalyptic number.

71489994 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

71489994 is an abundant number, since it is smaller than the sum of its proper divisors (78789366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71489994 is a wasteful number, since it uses less digits than its factorization.

71489994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574.

The product of its digits is 653184, while the sum is 51.

The square root of 71489994 is about 8455.1755747589. The cubic root of 71489994 is about 415.0321627950.

The spelling of 71489994 in words is "seventy-one million, four hundred eighty-nine thousand, nine hundred ninety-four".

Divisors: 1 2 3 6 37 43 74 86 111 129 222 258 1591 3182 4773 7489 9546 14978 22467 44934 277093 322027 554186 644054 831279 966081 1662558 1932162 11914999 23829998 35744997 71489994