709029540 has 72 divisors (see below), whose sum is σ = 2277245880. Its totient is φ = 177951744.

The previous prime is 709029539. The next prime is 709029583. The reversal of 709029540 is 45920907.

709029540 is a `hidden beast` number, since 7 + 0 + 90 + 29 + 540 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 293848164 + 415181376 = 17142^2 + 20376^2 .

It is a super-2 number, since 2×709029540² = 1005445777185223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 709029495 and 709029504.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112795 + ... + 118914.

It is an arithmetic number, because the mean of its divisors is an integer number (31628415).

Almost surely, 2^709029540 is an apocalyptic number.

It is an amenable number.

709029540 is an abundant number, since it is smaller than the sum of its proper divisors (1568216340).

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

709029540 is a wasteful number, since it uses less digits than its factorization.

709029540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231741 (or 231736 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 709029540 is about 26627.6086046044. The cubic root of 709029540 is about 891.7054954219.

The spelling of 709029540 in words is "seven hundred nine million, twenty-nine thousand, five hundred forty".