1620148732 has 24 divisors (see below), whose sum is σ = 2937740400. Its totient is φ = 781312896.

The previous prime is 1620148723. The next prime is 1620148781. The reversal of 1620148732 is 2378410261.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52257 + ... + 77272.

It is an arithmetic number, because the mean of its divisors is an integer number (122405850).

Almost surely, 2^1620148732 is an apocalyptic number.

It is an amenable number.

1620148732 is a deficient number, since it is larger than the sum of its proper divisors (1317591668).

1620148732 is a wasteful number, since it uses less digits than its factorization.

1620148732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129645 (or 129643 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1620148732 is about 40251.0711907149. The cubic root of 1620148732 is about 1174.4962336022.

Adding to 1620148732 its reverse (2378410261), we get a palindrome (3998558993).

The spelling of 1620148732 in words is "one billion, six hundred twenty million, one hundred forty-eight thousand, seven hundred thirty-two".