30377428 has 36 divisors (see below), whose sum is σ = 56913780. Its totient is φ = 14183424.

The previous prime is 30377423. The next prime is 30377429. The reversal of 30377428 is 82477303.

It can be written as a sum of positive squares in 2 ways, for example, as 14152644 + 16224784 = 3762^2 + 4028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30377393 and 30377402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30377423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157300 + ... + 157492.

Almost surely, 2^30377428 is an apocalyptic number.

30377428 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30377428 is a deficient number, since it is larger than the sum of its proper divisors (26536352).

30377428 is a wasteful number, since it uses less digits than its factorization.

30377428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 30377428 is about 5511.5721894937. The cubic root of 30377428 is about 312.0208867236.

The spelling of 30377428 in words is "thirty million, three hundred seventy-seven thousand, four hundred twenty-eight".