40724739 has 12 divisors (see below), whose sum is σ = 64172472. Its totient is φ = 24681600.

The previous prime is 40724699. The next prime is 40724777. The reversal of 40724739 is 93742704.

40724739 is a `hidden beast` number, since 407 + 247 + 3 + 9 = 666.

It is not a de Polignac number, because 40724739 - 2⁹ = 40724227 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40724339) 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, 205582 + ... + 205779.

It is an arithmetic number, because the mean of its divisors is an integer number (5347706).

Almost surely, 2^40724739 is an apocalyptic number.

40724739 is a deficient number, since it is larger than the sum of its proper divisors (23447733).

40724739 is a wasteful number, since it uses less digits than its factorization.

40724739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411378 (or 411375 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 40724739 is about 6381.5937664505. The cubic root of 40724739 is about 344.0483160682.

The spelling of 40724739 in words is "forty million, seven hundred twenty-four thousand, seven hundred thirty-nine".