290157972 has 192 divisors, whose sum is σ = 829108224. Its totient is φ = 78059520.

The previous prime is 290157971. The next prime is 290157977. The reversal of 290157972 is 279751092.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290157971) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4086697 + ... + 4086767.

It is an arithmetic number, because the mean of its divisors is an integer number (4318272).

Almost surely, 2^290157972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290157972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414554112).

290157972 is an abundant number, since it is smaller than the sum of its proper divisors (538950252).

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

290157972 is a wasteful number, since it uses less digits than its factorization.

290157972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 290157972 is about 17034.0239520790. The cubic root of 290157972 is about 662.0307607336.

The spelling of 290157972 in words is "two hundred ninety million, one hundred fifty-seven thousand, nine hundred seventy-two".