890360021 has 16 divisors (see below), whose sum is σ = 944199168. Its totient is φ = 838252800.

The previous prime is 890360017. The next prime is 890360027. The reversal of 890360021 is 120063098.

It is a cyclic number.

It is not a de Polignac number, because 890360021 - 2² = 890360017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890360027) 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, 373385 + ... + 375761.

It is an arithmetic number, because the mean of its divisors is an integer number (59012448).

Almost surely, 2^890360021 is an apocalyptic number.

It is an amenable number.

890360021 is a deficient number, since it is larger than the sum of its proper divisors (53839147).

890360021 is a wasteful number, since it uses less digits than its factorization.

890360021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 890360021 is about 29838.9011359333. The cubic root of 890360021 is about 962.0298560934.

The spelling of 890360021 in words is "eight hundred ninety million, three hundred sixty thousand, twenty-one".