74440431 has 16 divisors (see below), whose sum is σ = 118765920. Its totient is φ = 45809280.

The previous prime is 74440409. The next prime is 74440441. The reversal of 74440431 is 13404447.

It is not a de Polignac number, because 74440431 - 2¹⁴ = 74424047 is a prime.

It is a super-2 number, since 2×74440431² = 11082755534931522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 74440395 and 74440404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74440441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105690 + ... + 106391.

It is an arithmetic number, because the mean of its divisors is an integer number (7422870).

Almost surely, 2^74440431 is an apocalyptic number.

74440431 is a deficient number, since it is larger than the sum of its proper divisors (44325489).

74440431 is a wasteful number, since it uses less digits than its factorization.

74440431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212103 (or 212097 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 74440431 is about 8627.8868212326. The cubic root of 74440431 is about 420.6649161810.

Adding to 74440431 its reverse (13404447), we get a palindrome (87844878).

The spelling of 74440431 in words is "seventy-four million, four hundred forty thousand, four hundred thirty-one".