30551040 has 352 divisors, whose sum is σ = 123802560. Its totient is φ = 7077888.

The previous prime is 30551039. The next prime is 30551047. The reversal of 30551040 is 4015503.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30551047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1797112 + ... + 1797128.

Almost surely, 2^30551040 is an apocalyptic number.

30551040 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 30551040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61901280).

30551040 is an abundant number, since it is smaller than the sum of its proper divisors (93251520).

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

30551040 is a wasteful number, since it uses less digits than its factorization.

30551040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 30551040 is about 5527.2995214662. The cubic root of 30551040 is about 312.6141748134.

Adding to 30551040 its reverse (4015503), we get a palindrome (34566543).

It can be divided in two parts, 3055 and 1040, that added together give a triangular number (4095 = T₉₀).

The spelling of 30551040 in words is "thirty million, five hundred fifty-one thousand, forty".