1977303840 has 48 divisors (see below), whose sum is σ = 6228508608. Its totient is φ = 527280896.

The previous prime is 1977303793. The next prime is 1977303863. The reversal of 1977303840 is 483037791.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1977303792 and 1977303801.

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, 2059212 + ... + 2060171.

It is an arithmetic number, because the mean of its divisors is an integer number (129760596).

Almost surely, 2^1977303840 is an apocalyptic number.

1977303840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977303840 is an abundant number, since it is smaller than the sum of its proper divisors (4251204768).

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

1977303840 is a wasteful number, since it uses less digits than its factorization.

1977303840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119401 (or 4119393 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 1977303840 is about 44466.8847570864. The cubic root of 1977303840 is about 1255.1370124959.

It can be divided in two parts, 197 and 7303840, that added together give a palindrome (7304037).

The spelling of 1977303840 in words is "one billion, nine hundred seventy-seven million, three hundred three thousand, eight hundred forty".