981401028 has 24 divisors (see below), whose sum is σ = 2298210432. Its totient is φ = 325951584.

The previous prime is 981401023. The next prime is 981401033. The reversal of 981401028 is 820104189.

It is an interprime number because it is at equal distance from previous prime (981401023) and next prime (981401033).

It is a self number, because there is not a number n which added to its sum of digits gives 981401028.

It is not an unprimeable number, because it can be changed into a prime (981401023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144300 + ... + 150947.

It is an arithmetic number, because the mean of its divisors is an integer number (95758768).

Almost surely, 2^981401028 is an apocalyptic number.

It is an amenable number.

981401028 is an abundant number, since it is smaller than the sum of its proper divisors (1316809404).

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

981401028 is a wasteful number, since it uses less digits than its factorization.

981401028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295531 (or 295529 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 981401028 is about 31327.3207919222. The cubic root of 981401028 is about 993.7615047756.

The spelling of 981401028 in words is "nine hundred eighty-one million, four hundred one thousand, twenty-eight".