40744431 has 96 divisors (see below), whose sum is σ = 79672320. Its totient is φ = 20357568.

The previous prime is 40744409. The next prime is 40744453. The reversal of 40744431 is 13444704.

It is an interprime number because it is at equal distance from previous prime (40744409) and next prime (40744453).

It is not a de Polignac number, because 40744431 - 2¹³ = 40736239 is a prime.

It is a super-2 number, since 2×40744431² = 3320217315027522, which contains 22 as substring.

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 = 40744395 and 40744404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40744031) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 395526 + ... + 395628.

It is an arithmetic number, because the mean of its divisors is an integer number (829920).

Almost surely, 2^40744431 is an apocalyptic number.

40744431 is a deficient number, since it is larger than the sum of its proper divisors (38927889).

40744431 is a wasteful number, since it uses less digits than its factorization.

40744431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 149 counting only the distinct ones).

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

The square root of 40744431 is about 6383.1364547533. The cubic root of 40744431 is about 344.1037607267.

The spelling of 40744431 in words is "forty million, seven hundred forty-four thousand, four hundred thirty-one".