1402788399 has 8 divisors (see below), whose sum is σ = 1875745200. Its totient is φ = 932511936.

The previous prime is 1402788349. The next prime is 1402788407. The reversal of 1402788399 is 9938872041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1402788399 - 2⁷ = 1402788271 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402788349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668862 + ... + 670955.

It is an arithmetic number, because the mean of its divisors is an integer number (234468150).

Almost surely, 2^1402788399 is an apocalyptic number.

1402788399 is a deficient number, since it is larger than the sum of its proper divisors (472956801).

1402788399 is a wasteful number, since it uses less digits than its factorization.

1402788399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340169.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 1402788399 is about 37453.8168815943. The cubic root of 1402788399 is about 1119.4311521920.

The spelling of 1402788399 in words is "one billion, four hundred two million, seven hundred eighty-eight thousand, three hundred ninety-nine".