19400232 has 16 divisors (see below), whose sum is σ = 48500640. Its totient is φ = 6466736.

The previous prime is 19400231. The next prime is 19400233. The reversal of 19400232 is 23200491.

It is an interprime number because it is at equal distance from previous prime (19400231) and next prime (19400233).

It is a junction number, because it is equal to n+sod(n) for n = 19400199 and 19400208.

It is not an unprimeable number, because it can be changed into a prime (19400231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404148 + ... + 404195.

It is an arithmetic number, because the mean of its divisors is an integer number (3031290).

Almost surely, 2^19400232 is an apocalyptic number.

19400232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19400232 is an abundant number, since it is smaller than the sum of its proper divisors (29100408).

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

19400232 is a wasteful number, since it uses less digits than its factorization.

19400232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808352 (or 808348 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 19400232 is about 4404.5694454736. The cubic root of 19400232 is about 268.7008093131.

The spelling of 19400232 in words is "nineteen million, four hundred thousand, two hundred thirty-two".