1004028402 has 64 divisors (see below), whose sum is σ = 2223607680. Its totient is φ = 300326400.

The previous prime is 1004028383. The next prime is 1004028437. The reversal of 1004028402 is 2048204001.

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, 422277 + ... + 424647.

It is an arithmetic number, because the mean of its divisors is an integer number (34743870).

Almost surely, 2^1004028402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1004028402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111803840).

1004028402 is an abundant number, since it is smaller than the sum of its proper divisors (1219579278).

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

1004028402 is a wasteful number, since it uses less digits than its factorization.

1004028402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1004028402 is about 31686.4072119261. The cubic root of 1004028402 is about 1001.3410015776.

The spelling of 1004028402 in words is "one billion, four million, twenty-eight thousand, four hundred two".