825870090 has 16 divisors (see below), whose sum is σ = 1982088288. Its totient is φ = 220232016.

The previous prime is 825870079. The next prime is 825870103. The reversal of 825870090 is 90078528.

It is a super-2 number, since 2×825870090² = 1364122811113216200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13764472 + ... + 13764531.

It is an arithmetic number, because the mean of its divisors is an integer number (123880518).

Almost surely, 2^825870090 is an apocalyptic number.

825870090 is an abundant number, since it is smaller than the sum of its proper divisors (1156218198).

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

825870090 is a wasteful number, since it uses less digits than its factorization.

825870090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27529013.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 825870090 is about 28737.9555640272. The cubic root of 825870090 is about 938.2183280423.

The spelling of 825870090 in words is "eight hundred twenty-five million, eight hundred seventy thousand, ninety".