40724751 has 4 divisors (see below), whose sum is σ = 54299672. Its totient is φ = 27149832.

The previous prime is 40724699. The next prime is 40724777. The reversal of 40724751 is 15742704.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40724751 - 2⁷ = 40724623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40724051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6787456 + ... + 6787461.

It is an arithmetic number, because the mean of its divisors is an integer number (13574918).

Almost surely, 2^40724751 is an apocalyptic number.

40724751 is a deficient number, since it is larger than the sum of its proper divisors (13574921).

40724751 is a wasteful number, since it uses less digits than its factorization.

40724751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13574920.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 40724751 is about 6381.5947066544. The cubic root of 40724751 is about 344.0483498608.

The spelling of 40724751 in words is "forty million, seven hundred twenty-four thousand, seven hundred fifty-one".