742147128 has 48 divisors (see below), whose sum is σ = 2047916520. Its totient is φ = 242713536.

The previous prime is 742147123. The next prime is 742147139. The reversal of 742147128 is 821741247.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 742147092 and 742147101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742147123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93426 + ... + 101057.

Almost surely, 2^742147128 is an apocalyptic number.

It is an amenable number.

742147128 is an abundant number, since it is smaller than the sum of its proper divisors (1305769392).

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

742147128 is a wasteful number, since it uses less digits than its factorization.

742147128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194548 (or 194541 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 742147128 is about 27242.3774292920. The cubic root of 742147128 is about 905.3781385312.

The spelling of 742147128 in words is "seven hundred forty-two million, one hundred forty-seven thousand, one hundred twenty-eight".