1361939904 has 252 divisors, whose sum is σ = 4481236656. Its totient is φ = 393928704.

The previous prime is 1361939899. The next prime is 1361939933. The reversal of 1361939904 is 4099391631.

It is a self number, because there is not a number n which added to its sum of digits gives 1361939904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1654437 + ... + 1655259.

Almost surely, 2^1361939904 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 1361939904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2240618328).

1361939904 is an abundant number, since it is smaller than the sum of its proper divisors (3119296752).

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

1361939904 is a wasteful number, since it uses less digits than its factorization.

1361939904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 1361939904 is about 36904.4699731618. The cubic root of 1361939904 is about 1108.4581856498.

The spelling of 1361939904 in words is "one billion, three hundred sixty-one million, nine hundred thirty-nine thousand, nine hundred four".