1630142740 has 12 divisors (see below), whose sum is σ = 3423299796. Its totient is φ = 652057088.

The previous prime is 1630142729. The next prime is 1630142749. The reversal of 1630142740 is 472410361.

It can be written as a sum of positive squares in 2 ways, for example, as 1187629444 + 442513296 = 34462^2 + 21036^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1630142699 and 1630142708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630142749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40753549 + ... + 40753588.

It is an arithmetic number, because the mean of its divisors is an integer number (285274983).

Almost surely, 2^1630142740 is an apocalyptic number.

1630142740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630142740 is an abundant number, since it is smaller than the sum of its proper divisors (1793157056).

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

1630142740 is a wasteful number, since it uses less digits than its factorization.

1630142740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81507146 (or 81507144 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1630142740 is about 40375.0261919420. The cubic root of 1630142740 is about 1176.9062740048.

The spelling of 1630142740 in words is "one billion, six hundred thirty million, one hundred forty-two thousand, seven hundred forty".