101420440 has 32 divisors (see below), whose sum is σ = 248942160. Its totient is φ = 36880000.

The previous prime is 101420411. The next prime is 101420443. The reversal of 101420440 is 44024101.

It is a super-2 number, since 2×101420440² = 20572211299587200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101420443) 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, 114811 + ... + 115690.

Almost surely, 2^101420440 is an apocalyptic number.

101420440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101420440 is an abundant number, since it is smaller than the sum of its proper divisors (147521720).

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

101420440 is a wasteful number, since it uses less digits than its factorization.

101420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230523 (or 230519 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 101420440 is about 10070.7715692493. The cubic root of 101420440 is about 466.3462585197.

Adding to 101420440 its reverse (44024101), we get a palindrome (145444541).

The spelling of 101420440 in words is "one hundred one million, four hundred twenty thousand, four hundred forty".