40442751 has 12 divisors (see below), whose sum is σ = 58609200. Its totient is φ = 26873280.

The previous prime is 40442737. The next prime is 40442761. The reversal of 40442751 is 15724404.

It is not a de Polignac number, because 40442751 - 2¹⁵ = 40409983 is a prime.

It is a super-2 number, since 2×40442751² = 3271232216896002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4426 + ... + 10023.

It is an arithmetic number, because the mean of its divisors is an integer number (4884100).

Almost surely, 2^40442751 is an apocalyptic number.

40442751 is a deficient number, since it is larger than the sum of its proper divisors (18166449).

40442751 is a wasteful number, since it uses less digits than its factorization.

40442751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14766 (or 14763 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 40442751 is about 6359.4615338093. The cubic root of 40442751 is about 343.2523847451.

The spelling of 40442751 in words is "forty million, four hundred forty-two thousand, seven hundred fifty-one".