1039406928 has 160 divisors (see below), whose sum is σ = 3265790976. Its totient is φ = 278083584.

The previous prime is 1039406899. The next prime is 1039406939. The reversal of 1039406928 is 8296049301.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1039406928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1616175 + ... + 1616817.

Almost surely, 2^1039406928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1039406928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632895488).

1039406928 is an abundant number, since it is smaller than the sum of its proper divisors (2226384048).

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

1039406928 is a wasteful number, since it uses less digits than its factorization.

1039406928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1039406928 is about 32239.8344908903. The cubic root of 1039406928 is about 1012.9667785865.

The spelling of 1039406928 in words is "one billion, thirty-nine million, four hundred six thousand, nine hundred twenty-eight".