354821990 has 16 divisors (see below), whose sum is σ = 641547648. Its totient is φ = 141291456.

The previous prime is 354821981. The next prime is 354821993. The reversal of 354821990 is 99128453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354821993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77327 + ... + 81786.

It is an arithmetic number, because the mean of its divisors is an integer number (40096728).

Almost surely, 2^354821990 is an apocalyptic number.

354821990 is a deficient number, since it is larger than the sum of its proper divisors (286725658).

354821990 is a wasteful number, since it uses less digits than its factorization.

354821990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159343.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 354821990 is about 18836.7191941697. The cubic root of 354821990 is about 707.9515045996.

The spelling of 354821990 in words is "three hundred fifty-four million, eight hundred twenty-one thousand, nine hundred ninety".