42440398 has 128 divisors (see below), whose sum is σ = 95800320. Its totient is φ = 13547520.

The previous prime is 42440393. The next prime is 42440401. The reversal of 42440398 is 89304424.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42440393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 986965 + ... + 987007.

It is an arithmetic number, because the mean of its divisors is an integer number (748440).

Almost surely, 2^42440398 is an apocalyptic number.

42440398 is an abundant number, since it is smaller than the sum of its proper divisors (53359922).

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

42440398 is a wasteful number, since it uses less digits than its factorization.

42440398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 42440398 is about 6514.6295366659. The cubic root of 42440398 is about 348.8133910968.

The spelling of 42440398 in words is "forty-two million, four hundred forty thousand, three hundred ninety-eight".