1923557090 has 64 divisors (see below), whose sum is σ = 4341931776. Its totient is φ = 597272832.

The previous prime is 1923557059. The next prime is 1923557149. The reversal of 1923557090 is 907553291.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28289 + ... + 68171.

It is an arithmetic number, because the mean of its divisors is an integer number (67842684).

Almost surely, 2^1923557090 is an apocalyptic number.

1923557090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1923557090 is an abundant number, since it is smaller than the sum of its proper divisors (2418374686).

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

1923557090 is a wasteful number, since it uses less digits than its factorization.

1923557090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39963.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 1923557090 is about 43858.3753689076. The cubic root of 1923557090 is about 1243.6600778738.

The spelling of 1923557090 in words is "one billion, nine hundred twenty-three million, five hundred fifty-seven thousand, ninety".