40421400 has 48 divisors (see below), whose sum is σ = 125308200. Its totient is φ = 10778880.

The previous prime is 40421399. The next prime is 40421411. The reversal of 40421400 is 412404.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40421400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33085 + ... + 34284.

Almost surely, 2^40421400 is an apocalyptic number.

40421400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40421400 is an abundant number, since it is smaller than the sum of its proper divisors (84886800).

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

40421400 is a wasteful number, since it uses less digits than its factorization.

40421400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67388 (or 67379 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40421400 is about 6357.7826323334. The cubic root of 40421400 is about 343.1919695362.

Adding to 40421400 its reverse (412404), we get a palindrome (40833804).

The spelling of 40421400 in words is "forty million, four hundred twenty-one thousand, four hundred".