38321940 has 24 divisors (see below), whose sum is σ = 107301600. Its totient is φ = 10219168.

The previous prime is 38321939. The next prime is 38321951. The reversal of 38321940 is 4912383.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 38321898 and 38321907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319290 + ... + 319409.

It is an arithmetic number, because the mean of its divisors is an integer number (4470900).

Almost surely, 2^38321940 is an apocalyptic number.

38321940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38321940 is an abundant number, since it is smaller than the sum of its proper divisors (68979660).

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

38321940 is a wasteful number, since it uses less digits than its factorization.

38321940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638711 (or 638709 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 38321940 is about 6190.4717106211. The cubic root of 38321940 is about 337.1443056462.

The spelling of 38321940 in words is "thirty-eight million, three hundred twenty-one thousand, nine hundred forty".