747978346 has 8 divisors (see below), whose sum is σ = 1123666884. Its totient is φ = 373422720.

The previous prime is 747978317. The next prime is 747978373. The reversal of 747978346 is 643879747.

It can be written as a sum of positive squares in 2 ways, for example, as 558613225 + 189365121 = 23635^2 + 13761^2 .

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, 281575 + ... + 284218.

Almost surely, 2^747978346 is an apocalyptic number.

747978346 is a deficient number, since it is larger than the sum of its proper divisors (375688538).

747978346 is a wasteful number, since it uses less digits than its factorization.

747978346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566456.

The product of its digits is 7112448, while the sum is 55.

The square root of 747978346 is about 27349.1927851628. The cubic root of 747978346 is about 907.7432086752.

The spelling of 747978346 in words is "seven hundred forty-seven million, nine hundred seventy-eight thousand, three hundred forty-six".