749671378 has 4 divisors (see below), whose sum is σ = 1124507070. Its totient is φ = 374835688.

The previous prime is 749671343. The next prime is 749671381. The reversal of 749671378 is 873176947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873176947 = 1609 ⋅542683.

It can be written as a sum of positive squares in only one way, i.e., 725925249 + 23746129 = 26943^2 + 4873^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187417843 + ... + 187417846.

Almost surely, 2^749671378 is an apocalyptic number.

749671378 is a deficient number, since it is larger than the sum of its proper divisors (374835692).

749671378 is a wasteful number, since it uses less digits than its factorization.

749671378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374835691.

The product of its digits is 1778112, while the sum is 52.

The square root of 749671378 is about 27380.1274284836. The cubic root of 749671378 is about 908.4275779627.

The spelling of 749671378 in words is "seven hundred forty-nine million, six hundred seventy-one thousand, three hundred seventy-eight".