648764742 has 16 divisors (see below), whose sum is σ = 1342272240. Its totient is φ = 208797792.

The previous prime is 648764723. The next prime is 648764759. The reversal of 648764742 is 247467846.

It is a junction number, because it is equal to n+sod(n) for n = 648764691 and 648764700.

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, 1864093 + ... + 1864440.

It is an arithmetic number, because the mean of its divisors is an integer number (83892015).

Almost surely, 2^648764742 is an apocalyptic number.

648764742 is an abundant number, since it is smaller than the sum of its proper divisors (693507498).

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

648764742 is a wasteful number, since it uses less digits than its factorization.

648764742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728567.

The product of its digits is 1806336, while the sum is 48.

The square root of 648764742 is about 25470.8606450587. The cubic root of 648764742 is about 865.6900246600.

The spelling of 648764742 in words is "six hundred forty-eight million, seven hundred sixty-four thousand, seven hundred forty-two".