740138757 has 4 divisors (see below), whose sum is σ = 986851680. Its totient is φ = 493425836.

The previous prime is 740138753. The next prime is 740138759. The reversal of 740138757 is 757831047.

It is a happy number.

740138757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 740138757 - 2² = 740138753 is a prime.

It is a super-2 number, since 2×740138757² = 1095610759227010098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740138753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123356457 + ... + 123356462.

It is an arithmetic number, because the mean of its divisors is an integer number (246712920).

Almost surely, 2^740138757 is an apocalyptic number.

It is an amenable number.

740138757 is a deficient number, since it is larger than the sum of its proper divisors (246712923).

740138757 is a wasteful number, since it uses less digits than its factorization.

740138757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246712922.

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 740138757 is about 27205.4913023088. The cubic root of 740138757 is about 904.5607004805.

The spelling of 740138757 in words is "seven hundred forty million, one hundred thirty-eight thousand, seven hundred fifty-seven".