1239888474 has 48 divisors (see below), whose sum is σ = 2943892224. Its totient is φ = 374025600.

The previous prime is 1239888469. The next prime is 1239888499. The reversal of 1239888474 is 4748889321.

It is a happy number.

1239888474 is a `hidden beast` number, since 1 + 2 + 3 + 98 + 88 + 474 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1239888474.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30114 + ... + 58194.

It is an arithmetic number, because the mean of its divisors is an integer number (61331088).

Almost surely, 2^1239888474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1239888474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1471946112).

1239888474 is an abundant number, since it is smaller than the sum of its proper divisors (1704003750).

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

1239888474 is a wasteful number, since it uses less digits than its factorization.

1239888474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28323 (or 28320 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 1239888474 is about 35212.0501249217. The cubic root of 1239888474 is about 1074.3048612824.

The spelling of 1239888474 in words is "one billion, two hundred thirty-nine million, eight hundred eighty-eight thousand, four hundred seventy-four".