38210040 has 96 divisors (see below), whose sum is σ = 135486000. Its totient is φ = 9262080.

The previous prime is 38210027. The next prime is 38210041. The reversal of 38210040 is 4001283.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 38209995 and 38210022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38210041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 865 + ... + 8784.

Almost surely, 2^38210040 is an apocalyptic number.

38210040 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 38210040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67743000).

38210040 is an abundant number, since it is smaller than the sum of its proper divisors (97275960).

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

38210040 is a wasteful number, since it uses less digits than its factorization.

38210040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9677 (or 9670 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 38210040 is about 6181.4270197099. The cubic root of 38210040 is about 336.8158321236.

The spelling of 38210040 in words is "thirty-eight million, two hundred ten thousand, forty".