687400742 has 16 divisors (see below), whose sum is σ = 1189416960. Its totient is φ = 291846408.

The previous prime is 687400739. The next prime is 687400759. The reversal of 687400742 is 247004786.

It is a junction number, because it is equal to n+sod(n) for n = 687400696 and 687400705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227942 + ... + 230937.

It is an arithmetic number, because the mean of its divisors is an integer number (74338560).

Almost surely, 2^687400742 is an apocalyptic number.

687400742 is a deficient number, since it is larger than the sum of its proper divisors (502016218).

687400742 is a wasteful number, since it uses less digits than its factorization.

687400742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458995.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 687400742 is about 26218.3283601377. The cubic root of 687400742 is about 882.5446072036.

The spelling of 687400742 in words is "six hundred eighty-seven million, four hundred thousand, seven hundred forty-two".