40356973 has 16 divisors (see below), whose sum is σ = 44213760. Its totient is φ = 36723456.

The previous prime is 40356971. The next prime is 40356983. The reversal of 40356973 is 37965304.

It is not a de Polignac number, because 40356973 - 2¹ = 40356971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40356971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39493 + ... + 40501.

It is an arithmetic number, because the mean of its divisors is an integer number (2763360).

Almost surely, 2^40356973 is an apocalyptic number.

It is an amenable number.

40356973 is a deficient number, since it is larger than the sum of its proper divisors (3856787).

40356973 is a wasteful number, since it uses less digits than its factorization.

40356973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 40356973 is about 6352.7138295377. The cubic root of 40356973 is about 343.0095365775.

The spelling of 40356973 in words is "forty million, three hundred fifty-six thousand, nine hundred seventy-three".