42754644 has 18 divisors (see below), whose sum is σ = 108074330. Its totient is φ = 14251536.

The previous prime is 42754619. The next prime is 42754669. The reversal of 42754644 is 44645724.

42754644 is a `hidden beast` number, since 4 + 2 + 7 + 5 + 4 + 644 = 666.

It is an interprime number because it is at equal distance from previous prime (42754619) and next prime (42754669).

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 374544 = 6510^2 + 612^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1187629 = 42754644 / (4 + 2 + 7 + 5 + 4 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 42754599 and 42754608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593779 + ... + 593850.

Almost surely, 2^42754644 is an apocalyptic number.

It is an amenable number.

42754644 is an abundant number, since it is smaller than the sum of its proper divisors (65319686).

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

42754644 is a wasteful number, since it uses less digits than its factorization.

42754644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187639 (or 1187634 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 42754644 is about 6538.7035412228. The cubic root of 42754644 is about 349.6721937563.

The spelling of 42754644 in words is "forty-two million, seven hundred fifty-four thousand, six hundred forty-four".