740406538 has 8 divisors (see below), whose sum is σ = 1110730500. Its totient is φ = 370163040.

The previous prime is 740406523. The next prime is 740406587. The reversal of 740406538 is 835604047.

It can be written as a sum of positive squares in 2 ways, for example, as 726140809 + 14265729 = 26947^2 + 3777^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 740406497 and 740406506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15508 + ... + 41488.

Almost surely, 2^740406538 is an apocalyptic number.

740406538 is a deficient number, since it is larger than the sum of its proper divisors (370323962).

740406538 is a wasteful number, since it uses less digits than its factorization.

740406538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40232.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 740406538 is about 27210.4123085263. The cubic root of 740406538 is about 904.6697768577.

The spelling of 740406538 in words is "seven hundred forty million, four hundred six thousand, five hundred thirty-eight".