749891398 has 4 divisors (see below), whose sum is σ = 1124837100. Its totient is φ = 374945698.

The previous prime is 749891381. The next prime is 749891431. The reversal of 749891398 is 893198947.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187472848 + ... + 187472851.

It is an arithmetic number, because the mean of its divisors is an integer number (281209275).

Almost surely, 2^749891398 is an apocalyptic number.

749891398 is a deficient number, since it is larger than the sum of its proper divisors (374945702).

749891398 is a wasteful number, since it uses less digits than its factorization.

749891398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374945701.

The product of its digits is 3919104, while the sum is 58.

The square root of 749891398 is about 27384.1450113017. The cubic root of 749891398 is about 908.5164403146.

The spelling of 749891398 in words is "seven hundred forty-nine million, eight hundred ninety-one thousand, three hundred ninety-eight".