387972750 has 256 divisors, whose sum is σ = 1147281408. Its totient is φ = 86400000.

The previous prime is 387972659. The next prime is 387972757. The reversal of 387972750 is 57279783.

It is a self number, because there is not a number n which added to its sum of digits gives 387972750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387972757) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9462730 + ... + 9462770.

It is an arithmetic number, because the mean of its divisors is an integer number (4481568).

Almost surely, 2^387972750 is an apocalyptic number.

387972750 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 387972750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573640704).

387972750 is an abundant number, since it is smaller than the sum of its proper divisors (759308658).

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

387972750 is a wasteful number, since it uses less digits than its factorization.

387972750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 48.

The square root of 387972750 is about 19697.0238868718. The cubic root of 387972750 is about 729.3462277060.

The spelling of 387972750 in words is "three hundred eighty-seven million, nine hundred seventy-two thousand, seven hundred fifty".