1391920516 has 12 divisors (see below), whose sum is σ = 2783841088. Its totient is φ = 596537352.

The previous prime is 1391920499. The next prime is 1391920529. The reversal of 1391920516 is 6150291931.

It is a happy number.

1391920516 is an admirable number.

It is a super-3 number, since 3×1391920516³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24855696 + ... + 24855751.

Almost surely, 2^1391920516 is an apocalyptic number.

It is an amenable number.

1391920516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1391920516 is a wasteful number, since it uses less digits than its factorization.

1391920516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49711458 (or 49711456 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1391920516 is about 37308.4509997400. The cubic root of 1391920516 is about 1116.5327819682.

The spelling of 1391920516 in words is "one billion, three hundred ninety-one million, nine hundred twenty thousand, five hundred sixteen".