19243872 has 48 divisors (see below), whose sum is σ = 56130480. Its totient is φ = 6414336.

The previous prime is 19243871. The next prime is 19243877. The reversal of 19243872 is 27834291.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19243871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10273 + ... + 12000.

It is an arithmetic number, because the mean of its divisors is an integer number (1169385).

Almost surely, 2^19243872 is an apocalyptic number.

19243872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19243872 is an abundant number, since it is smaller than the sum of its proper divisors (36886608).

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

19243872 is a wasteful number, since it uses less digits than its factorization.

19243872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22292 (or 22278 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 19243872 is about 4386.7837876969. The cubic root of 19243872 is about 267.9769787903.

It can be divided in two parts, 192438 and 72, that added together give a triangular number (192510 = T₆₂₀).

The spelling of 19243872 in words is "nineteen million, two hundred forty-three thousand, eight hundred seventy-two".