40123457 has 8 divisors (see below), whose sum is σ = 43929120. Its totient is φ = 36344160.

The previous prime is 40123453. The next prime is 40123469. The reversal of 40123457 is 75432104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40123457 - 2² = 40123453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40123453) 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, 3332 + ... + 9557.

It is an arithmetic number, because the mean of its divisors is an integer number (5491140).

Almost surely, 2^40123457 is an apocalyptic number.

It is an amenable number.

40123457 is a deficient number, since it is larger than the sum of its proper divisors (3805663).

40123457 is a wasteful number, since it uses less digits than its factorization.

40123457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13183.

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

The square root of 40123457 is about 6334.3079337841. The cubic root of 40123457 is about 342.3466754719.

The spelling of 40123457 in words is "forty million, one hundred twenty-three thousand, four hundred fifty-seven".