42019900 has 36 divisors (see below), whose sum is σ = 98200312. Its totient is φ = 15514560.

The previous prime is 42019891. The next prime is 42019907. The reversal of 42019900 is 991024.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42019907) 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, 14862 + ... + 17461.

Almost surely, 2^42019900 is an apocalyptic number.

It is an amenable number.

42019900 is an abundant number, since it is smaller than the sum of its proper divisors (56180412).

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

42019900 is a wasteful number, since it uses less digits than its factorization.

42019900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32350 (or 32343 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 42019900 is about 6482.2758349209. The cubic root of 42019900 is about 347.6575549713.

The spelling of 42019900 in words is "forty-two million, nineteen thousand, nine hundred".