101720740 has 72 divisors (see below), whose sum is σ = 238859712. Its totient is φ = 36083520.

The previous prime is 101720701. The next prime is 101720767. The reversal of 101720740 is 47027101.

It is a super-2 number, since 2×101720740² = 20694217892295200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 987529 + ... + 987631.

It is an arithmetic number, because the mean of its divisors is an integer number (3317496).

Almost surely, 2^101720740 is an apocalyptic number.

101720740 is a gapful number since it is divisible by the number (10) 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 101720740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119429856).

101720740 is an abundant number, since it is smaller than the sum of its proper divisors (137138972).

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

101720740 is a wasteful number, since it uses less digits than its factorization.

101720740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 101720740 is about 10085.6700322785. The cubic root of 101720740 is about 466.8060796625.

Adding to 101720740 its reverse (47027101), we get a palindrome (148747841).

The spelling of 101720740 in words is "one hundred one million, seven hundred twenty thousand, seven hundred forty".