40723451 has 16 divisors (see below), whose sum is σ = 43110144. Its totient is φ = 38429664.

The previous prime is 40723447. The next prime is 40723477. The reversal of 40723451 is 15432704.

It is not a de Polignac number, because 40723451 - 2² = 40723447 is a prime.

It is a super-2 number, since 2×40723451² = 3316798922698802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40723451.

It is not an unprimeable number, because it can be changed into a prime (40723651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243770 + ... + 243936.

It is an arithmetic number, because the mean of its divisors is an integer number (2694384).

Almost surely, 2^40723451 is an apocalyptic number.

40723451 is a deficient number, since it is larger than the sum of its proper divisors (2386693).

40723451 is a wasteful number, since it uses less digits than its factorization.

40723451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 40723451 is about 6381.4928504230. The cubic root of 40723451 is about 344.0446889617.

The spelling of 40723451 in words is "forty million, seven hundred twenty-three thousand, four hundred fifty-one".