19268940 has 48 divisors (see below), whose sum is σ = 56302848. Its totient is φ = 4914624.

The previous prime is 19268929. The next prime is 19268941. The reversal of 19268940 is 4986291.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19268941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5602 + ... + 8361.

It is an arithmetic number, because the mean of its divisors is an integer number (1172976).

Almost surely, 2^19268940 is an apocalyptic number.

19268940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19268940 is an abundant number, since it is smaller than the sum of its proper divisors (37033908).

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

19268940 is a wasteful number, since it uses less digits than its factorization.

19268940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13998 (or 13996 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 19268940 is about 4389.6400763616. The cubic root of 19268940 is about 268.0932882334.

The spelling of 19268940 in words is "nineteen million, two hundred sixty-eight thousand, nine hundred forty".