385428780 has 240 divisors, whose sum is σ = 1352381184. Its totient is φ = 91082880.

The previous prime is 385428767. The next prime is 385428793. The reversal of 385428780 is 87824583.

385428780 is a `hidden beast` number, since 38 + 542 + 8 + 78 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (385428767) and next prime (385428793).

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 766009 + ... + 766511.

Almost surely, 2^385428780 is an apocalyptic number.

385428780 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 385428780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676190592).

385428780 is an abundant number, since it is smaller than the sum of its proper divisors (966952404).

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

385428780 is a wasteful number, since it uses less digits than its factorization.

385428780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 385428780 is about 19632.3401559773. The cubic root of 385428780 is about 727.7486024644.

The spelling of 385428780 in words is "three hundred eighty-five million, four hundred twenty-eight thousand, seven hundred eighty".