742747770 has 24 divisors (see below), whose sum is σ = 1931144436. Its totient is φ = 198066048.

The previous prime is 742747769. The next prime is 742747793. The reversal of 742747770 is 77747247.

It can be written as a sum of positive squares in 2 ways, for example, as 730783089 + 11964681 = 27033^2 + 3459^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4126287 + ... + 4126466.

Almost surely, 2^742747770 is an apocalyptic number.

742747770 is an abundant number, since it is smaller than the sum of its proper divisors (1188396666).

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

742747770 is a wasteful number, since it uses less digits than its factorization.

742747770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252766 (or 8252763 counting only the distinct ones).

The product of its (nonzero) digits is 537824, while the sum is 45.

The square root of 742747770 is about 27253.3992375263. The cubic root of 742747770 is about 905.6223225905.

The spelling of 742747770 in words is "seven hundred forty-two million, seven hundred forty-seven thousand, seven hundred seventy".