621948 has 12 divisors (see below), whose sum is σ = 1451240. Its totient is φ = 207312.

The previous prime is 621941. The next prime is 621983. The reversal of 621948 is 849126.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25903 + ... + 25926.

2⁶²¹⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

621948 is an abundant number, since it is smaller than the sum of its proper divisors (829292).

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

621948 is a wasteful number, since it uses less digits than its factorization.

621948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51836 (or 51834 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 621948 is about 788.6367985328. The cubic root of 621948 is about 85.3594009445.

The spelling of 621948 in words is "six hundred twenty-one thousand, nine hundred forty-eight".