74438765 has 16 divisors (see below), whose sum is σ = 91449648. Its totient is φ = 58146816.

The previous prime is 74438753. The next prime is 74438773. The reversal of 74438765 is 56783447.

It can be written as a sum of positive squares in 8 ways, for example, as 31326409 + 43112356 = 5597^2 + 6566^2 .

It is a cyclic number.

It is not a de Polignac number, because 74438765 - 2¹⁸ = 74176621 is a prime.

It is a super-2 number, since 2×74438765² = 11082259469450450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 67559 + ... + 68651.

It is an arithmetic number, because the mean of its divisors is an integer number (5715603).

It is the magic constant of a 530 × 530 magic square.

Almost surely, 2^74438765 is an apocalyptic number.

It is an amenable number.

74438765 is a deficient number, since it is larger than the sum of its proper divisors (17010883).

74438765 is a wasteful number, since it uses less digits than its factorization.

74438765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408.

The product of its digits is 564480, while the sum is 44.

The square root of 74438765 is about 8627.7902732971. The cubic root of 74438765 is about 420.6617779537.

The spelling of 74438765 in words is "seventy-four million, four hundred thirty-eight thousand, seven hundred sixty-five".