742891506 has 16 divisors (see below), whose sum is σ = 1698037824. Its totient is φ = 212254704.

The previous prime is 742891459. The next prime is 742891519. The reversal of 742891506 is 605198247.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 17687893 = 742891506 / (7 + 4 + 2 + 8 + 9 + 1 + 5 + 0 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8843905 + ... + 8843988.

It is an arithmetic number, because the mean of its divisors is an integer number (106127364).

Almost surely, 2^742891506 is an apocalyptic number.

742891506 is an abundant number, since it is smaller than the sum of its proper divisors (955146318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

742891506 is a wasteful number, since it uses less digits than its factorization.

742891506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17687905.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 742891506 is about 27256.0361388079. The cubic root of 742891506 is about 905.6807372769.

The spelling of 742891506 in words is "seven hundred forty-two million, eight hundred ninety-one thousand, five hundred six".