38972340 has 144 divisors (see below), whose sum is σ = 133922880. Its totient is φ = 9447840.

The previous prime is 38972321. The next prime is 38972357. The reversal of 38972340 is 4327983.

38972340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38972295 and 38972304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3542935 + ... + 3542945.

It is an arithmetic number, because the mean of its divisors is an integer number (930020).

Almost surely, 2^38972340 is an apocalyptic number.

38972340 is a gapful number since it is divisible by the number (30) 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 38972340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66961440).

38972340 is an abundant number, since it is smaller than the sum of its proper divisors (94950540).

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

38972340 is an equidigital number, since it uses as much as digits as its factorization.

38972340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 38972340 is about 6242.7830332313. The cubic root of 38972340 is about 339.0409536239.

The spelling of 38972340 in words is "thirty-eight million, nine hundred seventy-two thousand, three hundred forty".