1520273990 has 32 divisors (see below), whose sum is σ = 2756312064. Its totient is φ = 603721440.

The previous prime is 1520273897. The next prime is 1520274001. The reversal of 1520273990 is 993720251.

It is a super-2 number, since 2×1520273990² = 4622466009341040200, which contains 22 as substring.

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, 1280177 + ... + 1281363.

It is an arithmetic number, because the mean of its divisors is an integer number (86134752).

Almost surely, 2^1520273990 is an apocalyptic number.

1520273990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1520273990 is a deficient number, since it is larger than the sum of its proper divisors (1236038074).

1520273990 is a wasteful number, since it uses less digits than its factorization.

1520273990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 1520273990 is about 38990.6910685102. The cubic root of 1520273990 is about 1149.8484967397.

The spelling of 1520273990 in words is "one billion, five hundred twenty million, two hundred seventy-three thousand, nine hundred ninety".