749139550 has 24 divisors (see below), whose sum is σ = 1425808296. Its totient is φ = 292686240.

The previous prime is 749139511. The next prime is 749139551. The reversal of 749139550 is 55931947.

It is a super-2 number, since 2×749139550² = 1122420130748405000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 749139497 and 749139506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749139551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172069 + ... + 176368.

It is an arithmetic number, because the mean of its divisors is an integer number (59408679).

Almost surely, 2^749139550 is an apocalyptic number.

749139550 is a deficient number, since it is larger than the sum of its proper divisors (676668746).

749139550 is a wasteful number, since it uses less digits than its factorization.

749139550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348492 (or 348487 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 749139550 is about 27370.4137710777. The cubic root of 749139550 is about 908.2127098097.

The spelling of 749139550 in words is "seven hundred forty-nine million, one hundred thirty-nine thousand, five hundred fifty".