290878842 has 8 divisors (see below), whose sum is σ = 581757696. Its totient is φ = 96959612.

The previous prime is 290878807. The next prime is 290878849. The reversal of 290878842 is 248878092.

It is a sphenic number, since it is the product of 3 distinct primes.

290878842 is an admirable number.

It is a super-2 number, since 2×290878842² = 169221001446521928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 290878791 and 290878800.

It is not an unprimeable number, because it can be changed into a prime (290878849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24239898 + ... + 24239909.

It is an arithmetic number, because the mean of its divisors is an integer number (72719712).

Almost surely, 2^290878842 is an apocalyptic number.

290878842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

290878842 is a wasteful number, since it uses less digits than its factorization.

290878842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48479812.

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 290878842 is about 17055.1705356470. The cubic root of 290878842 is about 662.5785582410.

The spelling of 290878842 in words is "two hundred ninety million, eight hundred seventy-eight thousand, eight hundred forty-two".