40121406 has 40 divisors (see below), whose sum is σ = 96822264. Its totient is φ = 12344400.

The previous prime is 40121399. The next prime is 40121423. The reversal of 40121406 is 60412104.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7420 + ... + 11631.

Almost surely, 2^40121406 is an apocalyptic number.

40121406 is an abundant number, since it is smaller than the sum of its proper divisors (56700858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40121406 is a wasteful number, since it uses less digits than its factorization.

40121406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19078 (or 19069 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40121406 is about 6334.1460355758. The cubic root of 40121406 is about 342.3408421012.

The spelling of 40121406 in words is "forty million, one hundred twenty-one thousand, four hundred six".