1621408950 has 72 divisors (see below), whose sum is σ = 4978507248. Its totient is φ = 370607040.

The previous prime is 1621408933. The next prime is 1621409003. The reversal of 1621408950 is 598041261.

1621408950 is a `hidden beast` number, since 162 + 1 + 408 + 95 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 254217 + ... + 260516.

It is an arithmetic number, because the mean of its divisors is an integer number (69145934).

Almost surely, 2^1621408950 is an apocalyptic number.

1621408950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621408950 is an abundant number, since it is smaller than the sum of its proper divisors (3357098298).

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

1621408950 is a wasteful number, since it uses less digits than its factorization.

1621408950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514758 (or 514750 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1621408950 is about 40266.7226130958. The cubic root of 1621408950 is about 1174.8006784277.

The spelling of 1621408950 in words is "one billion, six hundred twenty-one million, four hundred eight thousand, nine hundred fifty".