1621500048 has 120 divisors (see below), whose sum is σ = 5271446336. Its totient is φ = 455673600.

The previous prime is 1621500019. The next prime is 1621500091. The reversal of 1621500048 is 8400051261.

It is a junction number, because it is equal to n+sod(n) for n = 1621499994 and 1621500030.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48303 + ... + 74673.

Almost surely, 2^1621500048 is an apocalyptic number.

1621500048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621500048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2635723168).

1621500048 is an abundant number, since it is smaller than the sum of its proper divisors (3649946288).

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

1621500048 is a wasteful number, since it uses less digits than its factorization.

1621500048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26453 (or 26444 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1621500048 is about 40267.8537794107. The cubic root of 1621500048 is about 1174.8226798662.

The spelling of 1621500048 in words is "one billion, six hundred twenty-one million, five hundred thousand, forty-eight".