1629989136 has 80 divisors (see below), whose sum is σ = 4767016320. Its totient is φ = 533070720.

The previous prime is 1629989117. The next prime is 1629989143. The reversal of 1629989136 is 6319899261.

1629989136 is a `hidden beast` number, since 1 + 629 + 9 + 8 + 9 + 1 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12700 + ... + 58491.

It is an arithmetic number, because the mean of its divisors is an integer number (59587704).

Almost surely, 2^1629989136 is an apocalyptic number.

1629989136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1629989136 is an abundant number, since it is smaller than the sum of its proper divisors (3137027184).

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

1629989136 is a wasteful number, since it uses less digits than its factorization.

1629989136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71261 (or 71249 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 1629989136 is about 40373.1239316454. The cubic root of 1629989136 is about 1176.8693072646.

The spelling of 1629989136 in words is "one billion, six hundred twenty-nine million, nine hundred eighty-nine thousand, one hundred thirty-six".