745138384 has 20 divisors (see below), whose sum is σ = 1444718916. Its totient is φ = 372307712.

The previous prime is 745138379. The next prime is 745138391. The reversal of 745138384 is 483831547.

It can be written as a sum of positive squares in 2 ways, for example, as 523128384 + 222010000 = 22872^2 + 14900^2 .

It is a super-2 number, since 2×745138384² = 1110462422620262912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 745138384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8292 + ... + 39484.

Almost surely, 2^745138384 is an apocalyptic number.

It is an amenable number.

745138384 is a deficient number, since it is larger than the sum of its proper divisors (699580532).

745138384 is a wasteful number, since it uses less digits than its factorization.

745138384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32694 (or 32688 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 745138384 is about 27297.2230089436. The cubic root of 745138384 is about 906.5928964873.

It can be divided in two parts, 745 and 138384, that added together give a square (139129 = 373²).

The spelling of 745138384 in words is "seven hundred forty-five million, one hundred thirty-eight thousand, three hundred eighty-four".