42177730 has 24 divisors (see below), whose sum is σ = 88316028. Its totient is φ = 14460768.

The previous prime is 42177727. The next prime is 42177781. The reversal of 42177730 is 3777124.

42177730 = T₄₆₀ + T₄₆₁ + ... + T₇₀₄.

It can be written as a sum of positive squares in 2 ways, for example, as 41203561 + 974169 = 6419^2 + 987^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42177692 and 42177701.

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, 42549 + ... + 43528.

Almost surely, 2^42177730 is an apocalyptic number.

42177730 is an abundant number, since it is smaller than the sum of its proper divisors (46138298).

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

42177730 is a wasteful number, since it uses less digits than its factorization.

42177730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86098 (or 86091 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 42177730 is about 6494.4383898841. The cubic root of 42177730 is about 348.0922873660.

The spelling of 42177730 in words is "forty-two million, one hundred seventy-seven thousand, seven hundred thirty".