290361021 has 32 divisors (see below), whose sum is σ = 423792000. Its totient is φ = 176133888.

The previous prime is 290361013. The next prime is 290361041. The reversal of 290361021 is 120163092.

It is not a de Polignac number, because 290361021 - 2³ = 290361013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 290360982 and 290361000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290361041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 444331 + ... + 444983.

It is an arithmetic number, because the mean of its divisors is an integer number (13243500).

Almost surely, 2^290361021 is an apocalyptic number.

It is an amenable number.

290361021 is a deficient number, since it is larger than the sum of its proper divisors (133430979).

290361021 is a wasteful number, since it uses less digits than its factorization.

290361021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 290361021 is about 17039.9830105549. The cubic root of 290361021 is about 662.1851517353.

The spelling of 290361021 in words is "two hundred ninety million, three hundred sixty-one thousand, twenty-one".