73870020 has 144 divisors (see below), whose sum is σ = 267321600. Its totient is φ = 16144128.

The previous prime is 73870009. The next prime is 73870031. The reversal of 73870020 is 2007837.

It is an interprime number because it is at equal distance from previous prime (73870009) and next prime (73870031).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27706 + ... + 30254.

It is an arithmetic number, because the mean of its divisors is an integer number (1856400).

Almost surely, 2^73870020 is an apocalyptic number.

73870020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73870020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133660800).

73870020 is an abundant number, since it is smaller than the sum of its proper divisors (193451580).

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

73870020 is a wasteful number, since it uses less digits than its factorization.

73870020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594 (or 2589 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 73870020 is about 8594.7670125490. The cubic root of 73870020 is about 419.5876906109.

Adding to 73870020 its reverse (2007837), we get a palindrome (75877857).

It can be divided in two parts, 738700 and 20, that added together give a triangular number (738720 = T₁₂₁₅).

The spelling of 73870020 in words is "seventy-three million, eight hundred seventy thousand, twenty".