290440857378 has 32 divisors (see below), whose sum is σ = 664005534336. Its totient is φ = 82965512448.

The previous prime is 290440857373. The next prime is 290440857397. The reversal of 290440857378 is 873758044092.

It is not an unprimeable number, because it can be changed into a prime (290440857373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531751 + ... + 929322.

It is an arithmetic number, because the mean of its divisors is an integer number (20750172948).

Almost surely, 2^290440857378 is an apocalyptic number.

290440857378 is an abundant number, since it is smaller than the sum of its proper divisors (373564676958).

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

290440857378 is a wasteful number, since it uses less digits than its factorization.

290440857378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465818.

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 290440857378 in words is "two hundred ninety billion, four hundred forty million, eight hundred fifty-seven thousand, three hundred seventy-eight".