42400918 has 16 divisors (see below), whose sum is σ = 72866304. Its totient is φ = 18127080.

The previous prime is 42400903. The next prime is 42400921. The reversal of 42400918 is 81900424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2521 + ... + 9547.

It is an arithmetic number, because the mean of its divisors is an integer number (4554144).

Almost surely, 2^42400918 is an apocalyptic number.

42400918 is a deficient number, since it is larger than the sum of its proper divisors (30465386).

42400918 is a wasteful number, since it uses less digits than its factorization.

42400918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7467.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42400918 is about 6511.5987284230. The cubic root of 42400918 is about 348.7051968155.

It can be divided in two parts, 42 and 400918, that added together give a triangular number (400960 = T₈₉₅).

The spelling of 42400918 in words is "forty-two million, four hundred thousand, nine hundred eighteen".