276621380 has 48 divisors (see below), whose sum is σ = 698839680. Its totient is φ = 89849088.

The previous prime is 276621349. The next prime is 276621407. The reversal of 276621380 is 83126672.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 276621380.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49337 + ... + 54656.

It is an arithmetic number, because the mean of its divisors is an integer number (14559160).

Almost surely, 2^276621380 is an apocalyptic number.

276621380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

276621380 is an abundant number, since it is smaller than the sum of its proper divisors (422218300).

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

276621380 is a wasteful number, since it uses less digits than its factorization.

276621380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104028 (or 104026 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 276621380 is about 16631.9385520750. The cubic root of 276621380 is about 651.5712519896.

The spelling of 276621380 in words is "two hundred seventy-six million, six hundred twenty-one thousand, three hundred eighty".