1402856640 has 336 divisors, whose sum is σ = 5249387520. Its totient is φ = 342558720.

The previous prime is 1402856617. The next prime is 1402856717. The reversal of 1402856640 is 466582041.

1402856640 is a `hidden beast` number, since 1 + 4 + 0 + 2 + 8 + 5 + 6 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1402856595 and 1402856604.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1695907 + ... + 1696733.

Almost surely, 2^1402856640 is an apocalyptic number.

1402856640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402856640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2624693760).

1402856640 is an abundant number, since it is smaller than the sum of its proper divisors (3846530880).

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

1402856640 is a wasteful number, since it uses less digits than its factorization.

1402856640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1402856640 is about 37454.7278724596. The cubic root of 1402856640 is about 1119.4493041011.

The spelling of 1402856640 in words is "one billion, four hundred two million, eight hundred fifty-six thousand, six hundred forty".