40140458 has 4 divisors (see below), whose sum is σ = 60210690. Its totient is φ = 20070228.

The previous prime is 40140431. The next prime is 40140461. The reversal of 40140458 is 85404104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22306729 + 17833729 = 4723^2 + 4223^2 .

It is a super-2 number, since 2×40140458² = 3222512736899528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035113 + ... + 10035116.

Almost surely, 2^40140458 is an apocalyptic number.

40140458 is a deficient number, since it is larger than the sum of its proper divisors (20070232).

40140458 is a wasteful number, since it uses less digits than its factorization.

40140458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20070231.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 40140458 is about 6335.6497693607. The cubic root of 40140458 is about 342.3950213723.

The spelling of 40140458 in words is "forty million, one hundred forty thousand, four hundred fifty-eight".