742686740 has 24 divisors (see below), whose sum is σ = 1563472680. Its totient is φ = 296345088.

The previous prime is 742686697. The next prime is 742686761. The reversal of 742686740 is 47686247.

It can be written as a sum of positive squares in 4 ways, for example, as 43930384 + 698756356 = 6628^2 + 26434^2 .

It is a junction number, because it is equal to n+sod(n) for n = 742686691 and 742686700.

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, 37217 + ... + 53576.

It is an arithmetic number, because the mean of its divisors is an integer number (65144695).

Almost surely, 2^742686740 is an apocalyptic number.

It is an amenable number.

742686740 is an abundant number, since it is smaller than the sum of its proper divisors (820785940).

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

742686740 is a wasteful number, since it uses less digits than its factorization.

742686740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91211 (or 91209 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

The square root of 742686740 is about 27252.2795376827. The cubic root of 742686740 is about 905.5975175596.

The spelling of 742686740 in words is "seven hundred forty-two million, six hundred eighty-six thousand, seven hundred forty".