1401276388 has 12 divisors (see below), whose sum is σ = 2473935660. Its totient is φ = 694437632.

The previous prime is 1401276379. The next prime is 1401276407. The reversal of 1401276388 is 8836721041.

It can be written as a sum of positive squares in 2 ways, for example, as 336428964 + 1064847424 = 18342^2 + 32632^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1401276388.

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, 1549633 + ... + 1550536.

It is an arithmetic number, because the mean of its divisors is an integer number (206161305).

Almost surely, 2^1401276388 is an apocalyptic number.

It is an amenable number.

1401276388 is a deficient number, since it is larger than the sum of its proper divisors (1072659272).

1401276388 is a wasteful number, since it uses less digits than its factorization.

1401276388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100286 (or 3100284 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1401276388 is about 37433.6264339965. The cubic root of 1401276388 is about 1119.0288105160.

The spelling of 1401276388 in words is "one billion, four hundred one million, two hundred seventy-six thousand, three hundred eighty-eight".