102020040 has 64 divisors (see below), whose sum is σ = 340070400. Its totient is φ = 27205056.

The previous prime is 102020021. The next prime is 102020053. The reversal of 102020040 is 40020201.

It is a Harshad number since it is a multiple of its sum of digits (9).

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, 46152 + ... + 48311.

It is an arithmetic number, because the mean of its divisors is an integer number (5313600).

Almost surely, 2^102020040 is an apocalyptic number.

102020040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102020040 is an abundant number, since it is smaller than the sum of its proper divisors (238050360).

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

102020040 is a wasteful number, since it uses less digits than its factorization.

102020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94483 (or 94473 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 102020040 is about 10100.4970174739. The cubic root of 102020040 is about 467.2634700043.

Adding to 102020040 its reverse (40020201), we get a palindrome (142040241).

The spelling of 102020040 in words is "one hundred two million, twenty thousand, forty".