19258940 has 24 divisors (see below), whose sum is σ = 40840800. Its totient is φ = 7627968.

The previous prime is 19258937. The next prime is 19258961. The reversal of 19258940 is 4985291.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19258894 and 19258903.

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, 2615 + ... + 6734.

It is an arithmetic number, because the mean of its divisors is an integer number (1701700).

Almost surely, 2^19258940 is an apocalyptic number.

19258940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19258940 is an abundant number, since it is smaller than the sum of its proper divisors (21581860).

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

19258940 is a wasteful number, since it uses less digits than its factorization.

19258940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461 (or 9459 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 19258940 is about 4388.5008829895. The cubic root of 19258940 is about 268.0469027586.

The spelling of 19258940 in words is "nineteen million, two hundred fifty-eight thousand, nine hundred forty".