101263640 has 32 divisors (see below), whose sum is σ = 228130560. Its totient is φ = 40454400.

The previous prime is 101263637. The next prime is 101263649. The reversal of 101263640 is 46362101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101263649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57980 + ... + 59700.

It is an arithmetic number, because the mean of its divisors is an integer number (7129080).

Almost surely, 2^101263640 is an apocalyptic number.

101263640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101263640 is an abundant number, since it is smaller than the sum of its proper divisors (126866920).

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

101263640 is a wasteful number, since it uses less digits than its factorization.

101263640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3199 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 101263640 is about 10062.9836529729. The cubic root of 101263640 is about 466.1058046577.

The spelling of 101263640 in words is "one hundred one million, two hundred sixty-three thousand, six hundred forty".