38712420 has 72 divisors (see below), whose sum is σ = 117936000. Its totient is φ = 10278720.

The previous prime is 38712407. The next prime is 38712433. The reversal of 38712420 is 2421783.

It is an interprime number because it is at equal distance from previous prime (38712407) and next prime (38712433).

It is a congruent number.

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, 77331 + ... + 77829.

It is an arithmetic number, because the mean of its divisors is an integer number (1638000).

Almost surely, 2^38712420 is an apocalyptic number.

38712420 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 38712420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58968000).

38712420 is an abundant number, since it is smaller than the sum of its proper divisors (79223580).

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

38712420 is a wasteful number, since it uses less digits than its factorization.

38712420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 38712420 is about 6221.9305685615. The cubic root of 38712420 is about 338.2855446805.

The spelling of 38712420 in words is "thirty-eight million, seven hundred twelve thousand, four hundred twenty".