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BaseRepresentation
bin1000100000111…
…10100111100100
311222101221120222
410100132213210
5121241203310
611030543512
71525063406
oct420364744
9158357528
1071428580
1137357393
121bb07b98
1311a4bb42
1496b4b76
15640e055
hex441e9e4

71428580 has 12 divisors (see below), whose sum is σ = 150000060. Its totient is φ = 28571424.

The previous prime is 71428571. The next prime is 71428583. The reversal of 71428580 is 8582417.

It can be written as a sum of positive squares in 2 ways, for example, as 48080356 + 23348224 = 6934^2 + 4832^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71428580.

It is not an unprimeable number, because it can be changed into a prime (71428583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785695 + ... + 1785734.

It is an arithmetic number, because the mean of its divisors is an integer number (12500005).

Almost surely, 271428580 is an apocalyptic number.

It is an amenable number.

71428580 is an abundant number, since it is smaller than the sum of its proper divisors (78571480).

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

71428580 is a wasteful number, since it uses less digits than its factorization.

71428580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571438 (or 3571436 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 71428580 is about 8451.5430543777. The cubic root of 71428580 is about 414.9132832797.

The spelling of 71428580 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred eighty".