742753978 has 8 divisors (see below), whose sum is σ = 1135152468. Its totient is φ = 364369824.

The previous prime is 742753939. The next prime is 742753981. The reversal of 742753978 is 879357247.

It can be written as a sum of positive squares in 2 ways, for example, as 732622489 + 10131489 = 27067^2 + 3183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503451 + ... + 3503662.

Almost surely, 2^742753978 is an apocalyptic number.

742753978 is a deficient number, since it is larger than the sum of its proper divisors (392398490).

742753978 is a wasteful number, since it uses less digits than its factorization.

742753978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007168.

The product of its digits is 2963520, while the sum is 52.

The square root of 742753978 is about 27253.5131313378. The cubic root of 742753978 is about 905.6248456937.

The spelling of 742753978 in words is "seven hundred forty-two million, seven hundred fifty-three thousand, nine hundred seventy-eight".