538309772 has 48 divisors (see below), whose sum is σ = 1264849152. Its totient is φ = 193596480.

The previous prime is 538309763. The next prime is 538309801. The reversal of 538309772 is 277903835.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63218 + ... + 71225.

It is an arithmetic number, because the mean of its divisors is an integer number (26351024).

Almost surely, 2^538309772 is an apocalyptic number.

538309772 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

538309772 is an abundant number, since it is smaller than the sum of its proper divisors (726539380).

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

538309772 is a wasteful number, since it uses less digits than its factorization.

538309772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134478 (or 134476 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 538309772 is about 23201.5036581684. The cubic root of 538309772 is about 813.4747701864.

The spelling of 538309772 in words is "five hundred thirty-eight million, three hundred nine thousand, seven hundred seventy-two".