538621240 has 16 divisors (see below), whose sum is σ = 1211897880. Its totient is φ = 215448480.

The previous prime is 538621231. The next prime is 538621243. The reversal of 538621240 is 42126835.

It is a super-2 number, since 2×538621240² = 580225680358275200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538621243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6732726 + ... + 6732805.

Almost surely, 2^538621240 is an apocalyptic number.

It is an amenable number.

538621240 is an abundant number, since it is smaller than the sum of its proper divisors (673276640).

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

538621240 is a wasteful number, since it uses less digits than its factorization.

538621240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13465542 (or 13465538 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 538621240 is about 23208.2149248924. The cubic root of 538621240 is about 813.6316330941.

The spelling of 538621240 in words is "five hundred thirty-eight million, six hundred twenty-one thousand, two hundred forty".