264021490 has 16 divisors (see below), whose sum is σ = 475991640. Its totient is φ = 105441280.

The previous prime is 264021467. The next prime is 264021493. The reversal of 264021490 is 94120462.

It can be written as a sum of positive squares in 4 ways, for example, as 176916601 + 87104889 = 13301^2 + 9333^2 .

It is not an unprimeable number, because it can be changed into a prime (264021493) 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, 14185 + ... + 27004.

Almost surely, 2^264021490 is an apocalyptic number.

264021490 is a deficient number, since it is larger than the sum of its proper divisors (211970150).

264021490 is a wasteful number, since it uses less digits than its factorization.

264021490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41837.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 264021490 is about 16248.7381048499. The cubic root of 264021490 is about 641.5242720705.

The spelling of 264021490 in words is "two hundred sixty-four million, twenty-one thousand, four hundred ninety".