1620436452 has 24 divisors (see below), whose sum is σ = 3843004032. Its totient is φ = 531290400.

The previous prime is 1620436429. The next prime is 1620436453. The reversal of 1620436452 is 2546340261.

It is not an unprimeable number, because it can be changed into a prime (1620436453) 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, 1106124 + ... + 1107587.

It is an arithmetic number, because the mean of its divisors is an integer number (160125168).

Almost surely, 2^1620436452 is an apocalyptic number.

1620436452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620436452 is an abundant number, since it is smaller than the sum of its proper divisors (2222567580).

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

1620436452 is a wasteful number, since it uses less digits than its factorization.

1620436452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213779 (or 2213777 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1620436452 is about 40254.6450984231. The cubic root of 1620436452 is about 1174.5657552142.

The spelling of 1620436452 in words is "one billion, six hundred twenty million, four hundred thirty-six thousand, four hundred fifty-two".