1390985651 has 16 divisors (see below), whose sum is σ = 1585543680. Its totient is φ = 1207926720.

The previous prime is 1390985621. The next prime is 1390985653. The reversal of 1390985651 is 1565890931.

It is not a de Polignac number, because 1390985651 - 2⁶ = 1390985587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1390985596 and 1390985605.

It is not an unprimeable number, because it can be changed into a prime (1390985653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208991 + ... + 215543.

It is an arithmetic number, because the mean of its divisors is an integer number (99096480).

Almost surely, 2^1390985651 is an apocalyptic number.

1390985651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1390985651 is a deficient number, since it is larger than the sum of its proper divisors (194558029).

1390985651 is a wasteful number, since it uses less digits than its factorization.

1390985651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7426.

The product of its (nonzero) digits is 291600, while the sum is 47.

The square root of 1390985651 is about 37295.9200315530. The cubic root of 1390985651 is about 1116.2827578274.

The spelling of 1390985651 in words is "one billion, three hundred ninety million, nine hundred eighty-five thousand, six hundred fifty-one".