901889994 has 16 divisors (see below), whose sum is σ = 1804098240. Its totient is φ = 300576960.

The previous prime is 901889993. The next prime is 901889999. The reversal of 901889994 is 499988109.

It is a happy number.

It is a super-2 number, since 2×901889994² = 1626811122554640072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (901889993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40099 + ... + 58409.

It is an arithmetic number, because the mean of its divisors is an integer number (112756140).

Almost surely, 2^901889994 is an apocalyptic number.

901889994 is an abundant number, since it is smaller than the sum of its proper divisors (902208246).

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

901889994 is a wasteful number, since it uses less digits than its factorization.

901889994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26525.

The product of its (nonzero) digits is 1679616, while the sum is 57.

The square root of 901889994 is about 30031.4833799465. The cubic root of 901889994 is about 966.1647524937.

The spelling of 901889994 in words is "nine hundred one million, eight hundred eighty-nine thousand, nine hundred ninety-four".