8139474 has 64 divisors (see below), whose sum is σ = 21070080. Its totient is φ = 2280960.

The previous prime is 8139473. The next prime is 8139479. The reversal of 8139474 is 4749318.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

Its product of digits (24192) is a multiple of the sum of its prime factors (432).

It is not an unprimeable number, because it can be changed into a prime (8139473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22882 + ... + 23234.

It is an arithmetic number, because the mean of its divisors is an integer number (329220).

Almost surely, 2^8139474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8139474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10535040).

8139474 is an abundant number, since it is smaller than the sum of its proper divisors (12930606).

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

8139474 is a wasteful number, since it uses less digits than its factorization.

8139474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 426 counting only the distinct ones).

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

The square root of 8139474 is about 2852.9763405959. The cubic root of 8139474 is about 201.1555934919.

The spelling of 8139474 in words is "eight million, one hundred thirty-nine thousand, four hundred seventy-four".