30625140 has 192 divisors, whose sum is σ = 108380160. Its totient is φ = 6289920.

The previous prime is 30625123. The next prime is 30625141. The reversal of 30625140 is 4152603.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30625141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 387621 + ... + 387699.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

Almost surely, 2^30625140 is an apocalyptic number.

30625140 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 30625140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54190080).

30625140 is an abundant number, since it is smaller than the sum of its proper divisors (77755020).

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

30625140 is a wasteful number, since it uses less digits than its factorization.

30625140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30625140 is about 5533.9985543908. The cubic root of 30625140 is about 312.8667140316.

Adding to 30625140 its reverse (4152603), we get a palindrome (34777743).

The spelling of 30625140 in words is "thirty million, six hundred twenty-five thousand, one hundred forty".