40401958 has 4 divisors (see below), whose sum is σ = 60602940. Its totient is φ = 20200978.

The previous prime is 40401941. The next prime is 40401971. The reversal of 40401958 is 85910404.

It is a happy number.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100488 + ... + 10100491.

It is an arithmetic number, because the mean of its divisors is an integer number (15150735).

Almost surely, 2^40401958 is an apocalyptic number.

40401958 is a deficient number, since it is larger than the sum of its proper divisors (20200982).

40401958 is a wasteful number, since it uses less digits than its factorization.

40401958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20200981.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40401958 is about 6356.2534562429. The cubic root of 40401958 is about 343.1369375621.

The spelling of 40401958 in words is "forty million, four hundred one thousand, nine hundred fifty-eight".