749740398 has 32 divisors (see below), whose sum is σ = 1680013440. Its totient is φ = 221052960.

The previous prime is 749740373. The next prime is 749740421. The reversal of 749740398 is 893047947.

It is a happy number.

It is a super-2 number, since 2×749740398² = 1124221328786396808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 749740398.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151068 + ... + 155951.

It is an arithmetic number, because the mean of its divisors is an integer number (52500420).

Almost surely, 2^749740398 is an apocalyptic number.

749740398 is an abundant number, since it is smaller than the sum of its proper divisors (930273042).

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

749740398 is a wasteful number, since it uses less digits than its factorization.

749740398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307072.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 749740398 is about 27381.3878026662. The cubic root of 749740398 is about 908.4554558432.

It can be divided in two parts, 7497 and 40398, that added together give a triangular number (47895 = T₃₀₉).

The spelling of 749740398 in words is "seven hundred forty-nine million, seven hundred forty thousand, three hundred ninety-eight".