1620748 has 24 divisors (see below), whose sum is σ = 2987712. Its totient is φ = 768384.

The previous prime is 1620743. The next prime is 1620769. The reversal of 1620748 is 8470261.

It is not an unprimeable number, because it can be changed into a prime (1620743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6840 + ... + 7072.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2^1620748 is an apocalyptic number.

It is an amenable number.

1620748 is a deficient number, since it is larger than the sum of its proper divisors (1366964).

1620748 is a wasteful number, since it uses less digits than its factorization.

1620748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1620748 is about 1273.0860143761. The cubic root of 1620748 is about 117.4641025092.

The spelling of 1620748 in words is "one million, six hundred twenty thousand, seven hundred forty-eight".