40320742 has 16 divisors (see below), whose sum is σ = 75405312. Its totient is φ = 15709320.

The previous prime is 40320737. The next prime is 40320743. The reversal of 40320742 is 24702304.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40320743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130758 + ... + 131065.

It is an arithmetic number, because the mean of its divisors is an integer number (4712832).

Almost surely, 2^40320742 is an apocalyptic number.

40320742 is a deficient number, since it is larger than the sum of its proper divisors (35084570).

40320742 is a wasteful number, since it uses less digits than its factorization.

40320742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261843.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 40320742 is about 6349.8615732943. The cubic root of 40320742 is about 342.9068587463.

The spelling of 40320742 in words is "forty million, three hundred twenty thousand, seven hundred forty-two".