42920290 has 32 divisors (see below), whose sum is σ = 91342080. Its totient is φ = 14207424.

The previous prime is 42920287. The next prime is 42920303. The reversal of 42920290 is 9202924.

It is a happy number.

42920290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8542 + ... + 12601.

It is an arithmetic number, because the mean of its divisors is an integer number (2854440).

Almost surely, 2^42920290 is an apocalyptic number.

42920290 is an abundant number, since it is smaller than the sum of its proper divisors (48421790).

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

42920290 is a wasteful number, since it uses less digits than its factorization.

42920290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21186.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 42920290 is about 6551.3578745173. The cubic root of 42920290 is about 350.1231947275.

The spelling of 42920290 in words is "forty-two million, nine hundred twenty thousand, two hundred ninety".