388479240 has 192 divisors, whose sum is σ = 1386927360. Its totient is φ = 97459200.

The previous prime is 388479233. The next prime is 388479251. The reversal of 388479240 is 42974883.

It is a super-3 number, since 3×388479240³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164065 + ... + 166415.

It is an arithmetic number, because the mean of its divisors is an integer number (7223580).

Almost surely, 2^388479240 is an apocalyptic number.

388479240 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 388479240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693463680).

388479240 is an abundant number, since it is smaller than the sum of its proper divisors (998448120).

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

388479240 is a wasteful number, since it uses less digits than its factorization.

388479240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 388479240 is about 19709.8767119432. The cubic root of 388479240 is about 729.6634715817.

The spelling of 388479240 in words is "three hundred eighty-eight million, four hundred seventy-nine thousand, two hundred forty".