38145780 has 72 divisors (see below), whose sum is σ = 117472992. Its totient is φ = 10017216.

The previous prime is 38145769. The next prime is 38145827. The reversal of 38145780 is 8754183.

38145780 is a `hidden beast` number, since 3 + 81 + 4 + 578 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

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, 10479 + ... + 13641.

Almost surely, 2^38145780 is an apocalyptic number.

38145780 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 38145780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58736496).

38145780 is an abundant number, since it is smaller than the sum of its proper divisors (79327212).

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

38145780 is a wasteful number, since it uses less digits than its factorization.

38145780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245 (or 3240 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 38145780 is about 6176.2270036002. The cubic root of 38145780 is about 336.6269120569.

The spelling of 38145780 in words is "thirty-eight million, one hundred forty-five thousand, seven hundred eighty".