1402689256 has 8 divisors (see below), whose sum is σ = 2630042370. Its totient is φ = 701344624.

The previous prime is 1402689241. The next prime is 1402689257. The reversal of 1402689256 is 6529862041.

It can be written as a sum of positive squares in only one way, i.e., 1163492100 + 239197156 = 34110^2 + 15466^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1402689257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87668071 + ... + 87668086.

Almost surely, 2^1402689256 is an apocalyptic number.

It is an amenable number.

1402689256 is a deficient number, since it is larger than the sum of its proper divisors (1227353114).

1402689256 is a wasteful number, since it uses less digits than its factorization.

1402689256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175336163 (or 175336159 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1402689256 is about 37452.4933215400. The cubic root of 1402689256 is about 1119.4047793911.

The spelling of 1402689256 in words is "one billion, four hundred two million, six hundred eighty-nine thousand, two hundred fifty-six".