42528740 has 24 divisors (see below), whose sum is σ = 89473272. Its totient is φ = 16980480.

The previous prime is 42528671. The next prime is 42528751. The reversal of 42528740 is 4782524.

It can be written as a sum of positive squares in 4 ways, for example, as 18164644 + 24364096 = 4262^2 + 4936^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42528697 and 42528706.

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, 11612 + ... + 14828.

It is an arithmetic number, because the mean of its divisors is an integer number (3728053).

Almost surely, 2^42528740 is an apocalyptic number.

It is an amenable number.

42528740 is an abundant number, since it is smaller than the sum of its proper divisors (46944532).

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

42528740 is a wasteful number, since it uses less digits than its factorization.

42528740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887 (or 3885 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 42528740 is about 6521.4062900574. The cubic root of 42528740 is about 349.0552480522.

The spelling of 42528740 in words is "forty-two million, five hundred twenty-eight thousand, seven hundred forty".