870642465 has 32 divisors (see below), whose sum is σ = 1736764416. Its totient is φ = 361824960.

The previous prime is 870642439. The next prime is 870642467. The reversal of 870642465 is 564246078.

It is not a de Polignac number, because 870642465 - 2⁹ = 870641953 is a prime.

It is a super-2 number, since 2×870642465² = 1516036603722552450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (870642467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375747 + ... + 378056.

It is an arithmetic number, because the mean of its divisors is an integer number (54273888).

Almost surely, 2^870642465 is an apocalyptic number.

It is an amenable number.

870642465 is a deficient number, since it is larger than the sum of its proper divisors (866121951).

870642465 is a wasteful number, since it uses less digits than its factorization.

870642465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753829.

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 870642465 is about 29506.6511993483. The cubic root of 870642465 is about 954.8752027563.

The spelling of 870642465 in words is "eight hundred seventy million, six hundred forty-two thousand, four hundred sixty-five".