40394457 has 20 divisors (see below), whose sum is σ = 62292736. Its totient is φ = 26059320.

The previous prime is 40394429. The next prime is 40394483. The reversal of 40394457 is 75449304.

It is not a de Polignac number, because 40394457 - 2¹⁴ = 40378073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40394407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5533 + ... + 10554.

Almost surely, 2^40394457 is an apocalyptic number.

It is an amenable number.

40394457 is a deficient number, since it is larger than the sum of its proper divisors (21898279).

40394457 is a wasteful number, since it uses less digits than its factorization.

40394457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16130 (or 16121 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 40394457 is about 6355.6633800100. The cubic root of 40394457 is about 343.1157007244.

The spelling of 40394457 in words is "forty million, three hundred ninety-four thousand, four hundred fifty-seven".