42699440 has 40 divisors (see below), whose sum is σ = 113460000. Its totient is φ = 14639616.

The previous prime is 42699413. The next prime is 42699457. The reversal of 42699440 is 4499624.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 42699394 and 42699403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37565 + ... + 38684.

It is an arithmetic number, because the mean of its divisors is an integer number (2836500).

Almost surely, 2^42699440 is an apocalyptic number.

42699440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42699440 is an abundant number, since it is smaller than the sum of its proper divisors (70760560).

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

42699440 is a wasteful number, since it uses less digits than its factorization.

42699440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76269 (or 76263 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42699440 is about 6534.4808516056. The cubic root of 42699440 is about 349.5216321957.

The spelling of 42699440 in words is "forty-two million, six hundred ninety-nine thousand, four hundred forty".