1208928240 has 400 divisors, whose sum is σ = 4597705728. Its totient is φ = 292626432.

The previous prime is 1208928229. The next prime is 1208928241. The reversal of 1208928240 is 428298021.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1208928195 and 1208928204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208928241) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9519057 + ... + 9519183.

Almost surely, 2^1208928240 is an apocalyptic number.

1208928240 is a gapful number since it is divisible by the number (10) 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 1208928240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2298852864).

1208928240 is an abundant number, since it is smaller than the sum of its proper divisors (3388777488).

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

1208928240 is a wasteful number, since it uses less digits than its factorization.

1208928240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1208928240 is about 34769.6453821433. The cubic root of 1208928240 is about 1065.2875240349.

The spelling of 1208928240 in words is "one billion, two hundred eight million, nine hundred twenty-eight thousand, two hundred forty".