1622155990 has 32 divisors (see below), whose sum is σ = 3593701440. Its totient is φ = 513385344.

The previous prime is 1622155949. The next prime is 1622156009. The reversal of 1622155990 is 995512261.

1622155990 is nontrivially palindromic in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890385 + ... + 892204.

It is an arithmetic number, because the mean of its divisors is an integer number (112303170).

Almost surely, 2^1622155990 is an apocalyptic number.

1622155990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1622155990 is an abundant number, since it is smaller than the sum of its proper divisors (1971545450).

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

1622155990 is a wasteful number, since it uses less digits than its factorization.

1622155990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782616.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 1622155990 is about 40275.9976909325. The cubic root of 1622155990 is about 1174.9810746914.

The spelling of 1622155990 in words is "one billion, six hundred twenty-two million, one hundred fifty-five thousand, nine hundred ninety".