1621434360 has 128 divisors (see below), whose sum is σ = 5986874880. Its totient is φ = 342102528.

The previous prime is 1621434337. The next prime is 1621434361. The reversal of 1621434360 is 634341261.

1621434360 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621434361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63322 + ... + 85161.

It is an arithmetic number, because the mean of its divisors is an integer number (46772460).

Almost surely, 2^1621434360 is an apocalyptic number.

1621434360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621434360 is an abundant number, since it is smaller than the sum of its proper divisors (4365440520).

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

1621434360 is a wasteful number, since it uses less digits than its factorization.

1621434360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148517 (or 148513 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1621434360 is about 40267.0381329444. The cubic root of 1621434360 is about 1174.8068153803.

The spelling of 1621434360 in words is "one billion, six hundred twenty-one million, four hundred thirty-four thousand, three hundred sixty".