740040389 has 4 divisors (see below), whose sum is σ = 807316800. Its totient is φ = 672763980.

The previous prime is 740040377. The next prime is 740040409. The reversal of 740040389 is 983040047.

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 a de Polignac number, because none of the positive numbers 2^k-740040389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740040359) 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, 33638189 + ... + 33638210.

It is an arithmetic number, because the mean of its divisors is an integer number (201829200).

Almost surely, 2^740040389 is an apocalyptic number.

It is an amenable number.

740040389 is a deficient number, since it is larger than the sum of its proper divisors (67276411).

740040389 is a wasteful number, since it uses less digits than its factorization.

740040389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67276410.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 740040389 is about 27203.6833719259. The cubic root of 740040389 is about 904.5206252160.

The spelling of 740040389 in words is "seven hundred forty million, forty thousand, three hundred eighty-nine".