740388621 has 8 divisors (see below), whose sum is σ = 1128211264. Its totient is φ = 423079200.

The previous prime is 740388613. The next prime is 740388631. The reversal of 740388621 is 126883047.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 740388621 - 2³ = 740388613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 740388621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740388601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17628280 + ... + 17628321.

It is an arithmetic number, because the mean of its divisors is an integer number (141026408).

Almost surely, 2^740388621 is an apocalyptic number.

It is an amenable number.

740388621 is a deficient number, since it is larger than the sum of its proper divisors (387822643).

740388621 is a wasteful number, since it uses less digits than its factorization.

740388621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35256611.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 740388621 is about 27210.0830759482. The cubic root of 740388621 is about 904.6624794707.

The spelling of 740388621 in words is "seven hundred forty million, three hundred eighty-eight thousand, six hundred twenty-one".