1225380380 has 24 divisors (see below), whose sum is σ = 2940913248. Its totient is φ = 420130368.

The previous prime is 1225380367. The next prime is 1225380439. The reversal of 1225380380 is 830835221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4376219 + ... + 4376498.

It is an arithmetic number, because the mean of its divisors is an integer number (122538052).

Almost surely, 2^1225380380 is an apocalyptic number.

1225380380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225380380 is an abundant number, since it is smaller than the sum of its proper divisors (1715532868).

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

1225380380 is a wasteful number, since it uses less digits than its factorization.

1225380380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8752733 (or 8752731 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1225380380 is about 35005.4335782318. The cubic root of 1225380380 is about 1070.0982179034.

The spelling of 1225380380 in words is "one billion, two hundred twenty-five million, three hundred eighty thousand, three hundred eighty".