30278040 has 96 divisors (see below), whose sum is σ = 98424720. Its totient is φ = 7448064.

The previous prime is 30277981. The next prime is 30278057. The reversal of 30278040 is 4087203.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 30278040.

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, 19534 + ... + 21026.

Almost surely, 2^30278040 is an apocalyptic number.

30278040 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 30278040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49212360).

30278040 is an abundant number, since it is smaller than the sum of its proper divisors (68146680).

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

30278040 is a wasteful number, since it uses less digits than its factorization.

30278040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1516 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 30278040 is about 5502.5485004678. The cubic root of 30278040 is about 311.6802279298.

The spelling of 30278040 in words is "thirty million, two hundred seventy-eight thousand, forty".