1825698990 has 32 divisors (see below), whose sum is σ = 4413670560. Its totient is φ = 483298304.

The previous prime is 1825698989. The next prime is 1825698997. The reversal of 1825698990 is 998965281.

It is a super-4 number, since 4×1825698990⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1825698990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1825698997) 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, 217995 + ... + 226214.

It is an arithmetic number, because the mean of its divisors is an integer number (137927205).

Almost surely, 2^1825698990 is an apocalyptic number.

1825698990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1825698990 is an abundant number, since it is smaller than the sum of its proper divisors (2587971570).

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

1825698990 is a wasteful number, since it uses less digits than its factorization.

1825698990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444356.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The square root of 1825698990 is about 42728.1990025323. The cubic root of 1825698990 is about 1222.2021924205.

The spelling of 1825698990 in words is "one billion, eight hundred twenty-five million, six hundred ninety-eight thousand, nine hundred ninety".